Are viruses biotic or abiotic? explain your !

What if the yeast were extremely active and produced more than 100ml gas. would you know? why/why not

Which best describes how sediment forms? loose material is cemented by pressure. erosion breaks down rock and other material. molten rock cools above earth's surface. chemical changes cause sediment to compact together.

What is the correct name for the animal pictured on the right? puma cougar panther mountain lion catamount